BoA will play the role of "Kwon Bo Young is described as an elite woman who is filled with confidence and passion towards work. After mysteriously returning as a single woman, she sports tight ponytails and only eats triangle kimbab with beer. Her character is known to be a successful working woman with no interest in things such as relationships." -Soompi

Lee Sun Gyun as Do Hyun Woo
Song Ji Hyo as Jung Soo Yun
Kim Hee Won as Choi Yoon Gi
Ye Ji Won as Eun Ah Ra
Lee Sang Yeob as Ahn Joon Young
BoA as Kwon Bo Young

PLOT
It is "a cheerful and comical drama that deals with infidelity and marital reconciliation, and centers around three couples. Lee Seon-kyun is one-half of the dramaâ€™s central couple, paired with Song Ji-hyo (Ex-Girlfriend Club); heâ€™s a veteran PD who once dreamed of being a film director, and sheâ€™s the â€œworld-class supermomâ€ whoâ€™s got it all together at home and at work. Theyâ€™ve been married for eight years in what he believed was a strong relationship, until he catches on to a sign that his wife is on the verge of cheating, at which point he turns to the internet for advice." -Soompi

The crew of JTBC's upcoming drama 'This Week, My Wife is Cheating' had some good words for BoA!

The singer will be taking on the role of Kwon Bo Young, a screenwriter who works closely with Lee Sun Gyun and who will also often appear as the "too-busy-working-to-take-care-of-myself" workaholic.
The staff relayed about BoA, in addition to revealing some behind-the-scenes cuts,"Her will is amazing. Even during our script reading last month, she had 8 episodes worth of the script completely memorized. Please look forward to Kwon Bo Young, who will be showing off as many qualities as she's preparing for."
'This Week, My Wife is Cheating' starring BoA, Lee Sun Gyun, Song Ji Hyo, Lee Sang Yup, and more begins airing October 28!

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chinese translation: Yanira @ Song Ji Hyo Baidu Bar
english translation, timecode&transcode: @gapiplus

I dont think so, i think this couple are not yet couple as BoA will be just an workaholic woman who doesnt take care of herself and dont give poop about love. I guess we will see her transform to a lovely pretty woman and dating the guy in the end lol